4800 denarii	6 turns	Large City

Damming rivers and using waterwheels to raise water to fields is labour intensive, but the pay offs can be spectacular. In some parts of the world it's even possible to gather more than one harvest a year when irrigation is used. Overall, extensive irrigation systems improve all farm production, creating even larger surpluses that can be sent to support a growing urban population.

• Samnites
• Etruscans

• +2.0% Growth and +320 Income